External (HOB)

Hang on Back overflows allow you to plumb your display tank to a sump or other filtration systems, without having to drill any holes in your aquarium. Using a siphon principal, external overflows will bring the water up and over the edge of your tank, before it travels down to your sump. Since the water is being pulled above your aquariums rim, we highly recommend water on floor sensors and a constantly running pump to ensure air does not build up in the overflow and stopping the siphon.
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12 Items

  1. Deluxe CS150 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS150 Overflow with Lid and Air Pump - CPR Aquatics
    $274.99

    Earn 5,480 Reward Points Earn 1,370 Reward Points

    $274.99
  2. Deluxe CS102 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS102 Overflow with Lid and Air Pump - CPR Aquatics
    $264.99

    Earn 5,280 Reward Points Earn 1,320 Reward Points

    $264.99
  3. Deluxe CS90 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS90 Overflow with Lid and Air Pump - CPR Aquatics
    $229.99

    Earn 4,580 Reward Points Earn 1,145 Reward Points

    $229.99
  4. Deluxe CS50 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS50 Overflow with Lid and Air Pump - CPR Aquatics
    $199.99

    Earn 3,980 Reward Points Earn 995 Reward Points

    $199.99
  5. Deluxe CS100 Overflow with Lid and Air Pump - CPR Aquatics
    CPR Aquatics
    Deluxe CS100 Overflow with Lid and Air Pump - CPR Aquatics
    $249.99

    Earn 4,980 Reward Points Earn 1,245 Reward Points

    $249.99
  6. Replacement CS Overflow Sponge - CPR Aquatics
    CPR Aquatics
    Replacement CS Overflow Sponge - CPR Aquatics

    Starting at: $3.99

    Earn 60 Reward Points Earn 15 Reward Points

  7. PF Overflow Replacement Foam Sponges - Eshopps
    Eshopps
    PF Overflow Replacement Foam Sponges - Eshopps

    Starting at: $6.98

    Earn 120 Reward Points Earn 30 Reward Points

  8. PF-Nano HOB Overflow - Eshopps
    Eshopps
    PF-Nano HOB Overflow - Eshopps
    $89.98

    Earn 1,780 Reward Points Earn 445 Reward Points

    $89.98
  9. PF-300 HOB Overflow - Eshopps
    Eshopps
    PF-300 HOB Overflow - Eshopps
    $109.98

    Earn 2,180 Reward Points Earn 545 Reward Points

    $109.98
  10. PF-800 HOB Overflow - Eshopps
    Eshopps
    PF-800 HOB Overflow - Eshopps
    $119.98

    Earn 2,380 Reward Points Earn 595 Reward Points

    $119.98
  11. PF-1000 HOB Overflow - Eshopps
    Eshopps
    PF-1000 HOB Overflow - Eshopps
    $139.98

    Earn 2,780 Reward Points Earn 695 Reward Points

    $139.98
  12. PF-1200 HOB Overflow - Eshopps
    Eshopps
    PF-1200 HOB Overflow - Eshopps
    $149.98

    Earn 2,980 Reward Points Earn 745 Reward Points

    $149.98
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